Question 1

Does this work on Jeep's Schrader valve?

Accepted Answer

As far as I know there are only two styles of test ports on most cars that actually have test ports with the schrader style. The adaptor included is for the smaller style port ( same as a tire valve stem). Ford used that style. The larger port style  that is permanently attached to the testers hose. Is generally found on  GM & Chrysler

Question 2

Can this be used on diesel (ford f350 7.3) and if yes do I need any adapter?

Accepted Answer

I would think that since the 7.3L fuel bowl / filter housing, should only be running between 45-60 psi, this gauge would work. I know it says not to use on Diesel engines, but I think thats a blanket statement for liability and stupidity reasons. High pressure is very common on Diesel engines, but not all, not the 7.3L! Also, the 7.3 will run between 45-60 (closer to 55 when good) psi even when a load is introduced. You will get dips on start up, due to electrical drop from starter draw. You'll also experience a subtle dip when quickly accelerated, but usually returns close to original idle psi or a little below. Not much though. If you are going to buy special diesel fuel pressure gauges, and all you own is a 7.3L PS, you may be wasting your money. I wouldn't know though, I doesn't have my degree in Diesel Mechanics and SHOULD post about stuff me don't know.... Lighten up! People ask questions and answer to help each other. Martin gave you the best answer, as this is the missing link for measuring my fuel pressure, fuel bowl adapter! Tip: If the gauge reads less than factory norms, don't do it...If it reads way way way less, like 200 + psi less, DON'T DO IT! But other than that, you'll be good. Jumped in this way late, but glad I did.

Question 3

Will it fit a 2004 Saturn 3.0 V6?

Accepted Answer

yes

Question 4

will this work on a mercury outboard fuel injection with a schrader valve

Accepted Answer

It will work on merc fuel system schrader

ASIN	B000R5IASC
Best Sellers Rank	#52,255 in Automotive ( See Top 100 in Automotive ) #25 in Fuel Pressure Testers
Brand Name	OTC
Customer Reviews	4.5 4.5 out of 5 stars (1,428)
Global Trade Identification Number	00731413418570
Included Components	Tester with attached hoses & adapter fitting
Item Dimensions	11.7 x 4.7 x 1.7 inches
Item Highlight	Quickly and Easily Locate Malfunctioning Fuel System Components, including Pumps, Filters, Regulators, and Lines - On Vehicle
Item Type Name	Fuel Tester
Item Weight	1 g
Manufacturer	OTC
Material Type	Brass, Rubber
Model	5630
Number of Items	1
Part Number	5630
UPC	731413418570
Unit Count	1 Count
Warranty Description	Limited lifetime warranty

OTC 5630 Fuel Pressure Test Kit

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